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Journal articles on the topic 'Electrochemical analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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1

Wang, Qiong, Weiting Ye, Dongling Li, Jiangwei Zhu, Chenghang Liu, Cheng-Te Lin, Li Fu, and Zenglai Xu. "Analysis of Electrochemically Active Substances in Malvaceae Leaves via Electroanalytical Sensing Technology for Species Identification." Micromachines 14, no. 2 (January 18, 2023): 248. http://dx.doi.org/10.3390/mi14020248.

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Electrochemical analysis has become a new method for plant analysis in recent years. It can not only collect signals of electrochemically active substances in plant tissues, but can also be used to identify plant species. At the same time, the signals of electrochemically active substances in plant tissues can also be used to investigate plant phylogeny. In this work, we collected electrochemical finger patterns in Malvaceae leaves based on the established methodological strategy. After the second derivative treatment, the collected electrochemical fingerprints can show more obvious differences. Three different recognition models were used to attempt electrochemical fingerprinting. The results show that linear support vector classification can be used to identify species with high accuracy by combining the electrochemical fingerprint signals collected in the phosphoric acid buffer solution and acetic acid buffer solution. In addition, the fingerprint information collected by the electrochemical sensor is further used for phylogenetic investigation. The 18 species were divided into three clusters. Species of the same genus have been clustered together. Dendrogram obtained by electrochemical fingerprinting was used to compare previously reported results deduced from morphological and complete chloroplast genomes.

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2

Fan, Boyuan, Qiong Wang, Weihong Wu, Qinwei Zhou, Dongling Li, Zenglai Xu, Li Fu, Jiangwei Zhu, Hassan Karimi-Maleh, and Cheng-Te Lin. "Electrochemical Fingerprint Biosensor for Natural Indigo Dye Yielding Plants Analysis." Biosensors 11, no. 5 (May 14, 2021): 155. http://dx.doi.org/10.3390/bios11050155.

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Indigo is a plant dye that has been used as an important dye by various ancient civilizations throughout history. Today, due to environmental and health concerns, plant indigo is re-entering the market. Strobilanthes cusia (Nees) Kuntze is the most widely used species in China for indigo preparation. However, other species under Strobilanthes have a similar feature. In this work, 12 Strobilanthes spp. were analyzed using electrochemical fingerprinting technology. Depending on their electrochemically active molecules, they can be quickly identified by fingerprinting. In addition, the fingerprint obtained under different conditions can be used to produce scattered patter and heatmap. These patterns make plant identification more convenient. Since the electrochemically active components in plants reflect the differences at the gene level to some extent, the obtained electrochemical fingerprints are further used for the discussion of phylogenetics.

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3

Elmasly, Saadeldin E. T., Luca Guerrini, Joseph Cameron, Alexander L. Kanibolotsky, Neil J. Findlay, Karen Faulds, and Peter J. Skabara. "Synergistic electrodeposition of bilayer films and analysis by Raman spectroscopy." Beilstein Journal of Organic Chemistry 14 (August 21, 2018): 2186–89. http://dx.doi.org/10.3762/bjoc.14.191.

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A novel methodology towards fabrication of multilayer organic devices, employing electrochemical polymer growth to form PEDOT and PEDTT layers, is successfully demonstrated. Moreover, careful control of the electrochemical conditions allows the degree of doping to be effectively altered for one of the polymer layers. Raman spectroscopy confirmed the formation and doped states of the PEDOT/PEDTT bilayer. The electrochemical deposition of a bilayer containing a de-doped PEDTT layer on top of doped PEDOT is analogous to a solution-processed organic semiconductor layer deposited on top of a PEDOT:PSS layer without the acidic PSS polymer. However, the poor solubility of electrochemically deposited PEDTT (or other electropolymerised potential candidates) raises the possibility of depositing a subsequent layer via solution-processing.

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4

Zhang, Hong Bo, Yong Sheng Li, Ting Ting Ning, and Ying Ying Zhu. "Analysis of Electrochemical Mechanism of Electrolyte and Coal." Advanced Materials Research 962-965 (June 2014): 837–42. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.837.

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In order to study the electrochemical performance of coal in the HCL electrolyte system, researchers prepared the chemically modified carbon paste electrode, measured the volt-ampere curves and Tafel curves of the samples and analyzed the mechanism of the electrochemically catalysis of oxidation of coal. The studies indicate that what occurs to the coal sample in the process of electrolytic sulfur removing is a quasi-reversible diffusion controlled process. In the beginning of the sulfur removing, the rate of electrolytic corrosion is fast, in which oxidation on the anode denominates, and the cathode plays a role of reduction in the late period.

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5

Ueda, Tadaharu. "Recent Achievements in the Analysis of the Electrochemical Properties of Polyoxometalates." Review of Polarography 61, no. 1 (2015): 11–19. http://dx.doi.org/10.5189/revpolarography.61.11.

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6

Zhou, Xiao-Dong. "(Keynote) Theoretical Analysis of Electrochemical Stability in a Solid Oxide Cell." ECS Meeting Abstracts MA2022-01, no. 38 (July 7, 2022): 1670. http://dx.doi.org/10.1149/ma2022-01381670mtgabs.

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In this talk, I will describe a theoretical analysis and modeling of electrochemical stability in solid oxide cells, including solid oxide fuel cell, solid oxide electrolysis, and solid-state batteries. Focus will be on elucidating the origin for the electrochemically driven of phase change and the deposition of neutral species at the interfaces and inside a solid electrolyte.

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7

Slepushkin, V. V., Yu V. Rublinetskaya, and B. M. Stifatov. "Local electrochemical surface analysis." Journal of Analytical Chemistry 60, no. 2 (February 2005): 103–6. http://dx.doi.org/10.1007/pl00021912.

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8

Karadurmus, Leyla, Duru Kır, Sevinc Kurbanoglu, and Sibel A. Ozkan. "Electrochemical Analysis of Antipsychotics." Current Pharmaceutical Analysis 15, no. 5 (May 23, 2019): 413–28. http://dx.doi.org/10.2174/1573412914666180710114458.

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Introduction:Schizophrenia is seizures accompanied by severe psychotic symptoms, and a steady state of continuation in the form of periods of stagnation. Antipsychotics are now the basis of treatment for schizophrenia and there is no other molecule that is antipsychotic priority in treatment. Antipsychotics can be classified into two groups; dopamine receptor antagonists such as promazine, fluphenazine etc. and serotonin-dopamine antagonists including risperidone, olanzapine, ziprasidone, aripiprazole etc.Materials and Methods:Electrochemical methods have been used for the determination of antipsychotic agent just as used in the determination of many drug agents. Nearly all of the antipsychotics are electroactive and can be analyzed by electrochemical methods. Electroanalytical methods offer generally high sensitivity, are compatible with modern techniques, have low cost, low requirements, and compact design. Among the most commonly used types, there are cyclic voltammetry, differential pulse voltammetry, square wave voltammetry and linear sweep voltammetry.Conclusion:The aim of this review is to evaluate the main line and the advantages and uses of electroanalytical methods that employed for the determination of antipsychotic medication agents used in schizophrenia. Moreover, applications of the methods to pharmaceutical analysis of Antipsychotics upto- date is also summarized in a table.

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9

Bucher, Elizabeth S., and R. Mark Wightman. "Electrochemical Analysis of Neurotransmitters." Annual Review of Analytical Chemistry 8, no. 1 (July 22, 2015): 239–61. http://dx.doi.org/10.1146/annurev-anchem-071114-040426.

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10

Parsons, Roger. "Fundamentals of electrochemical analysis." Journal of Electroanalytical Chemistry 371, no. 1-2 (June 1994): 293. http://dx.doi.org/10.1016/0022-0728(94)03416-8.

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11

Hart, John P. "Fundamentals of electrochemical analysis." Analytica Chimica Acta 300, no. 1-3 (January 1995): 337–38. http://dx.doi.org/10.1016/0003-2670(95)90227-9.

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12

Nasef, Hany, Valerio Beni, and Ciara K. O'Sullivan. "Electrochemical melting-curve analysis." Electrochemistry Communications 12, no. 8 (August 2010): 1030–33. http://dx.doi.org/10.1016/j.elecom.2010.05.016.

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13

Slepushkin, V. V., Yu V. Rublinetskaya, and B. M. Stifatov. "Local electrochemical surface analysis." Journal of Analytical Chemistry 60, no. 2 (February 2005): 103–6. http://dx.doi.org/10.1007/s10809-005-0002-4.

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14

Slepushkin, V. V., Yu V. Rublinetskaya, and B. M. Stifatov. "Local electrochemical surface analysis." Journal of Analytical Chemistry 60, no. 2 (February 2005): 103–6. http://dx.doi.org/10.1007/s10809-005-0030-0.

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15

Budnikov, G. K. "Electrochemical methods of analysis." Journal of Analytical Chemistry 55, no. 11 (November 2000): 1007. http://dx.doi.org/10.1007/bf02757322.

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16

Soleymani, Leyla, and Yingfu Li. "Electrochemical Biosensors for Clinical Analysis." ECS Meeting Abstracts MA2023-01, no. 53 (August 28, 2023): 2641. http://dx.doi.org/10.1149/ma2023-01532641mtgabs.

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In this talk, we will discuss the marriage of nucleic acids with electrochemical biosensors for the development of rapid clinical tests. These tests integrate both functional nucleic acids (aptamers and DNAzymes) and antibody/DNA complexes for developing barcode-based electrochemical biosensors. The barcode is a DNA strand modified with an electrochemical label that can be detected using an electrochemical chip. Following the presentation of different DNA barcoding methods, we will also present strategies for operating these biosensors in blood, saliva, and urine for direct analysis of clinical samples for the diagnosis of infectious diseases and cancer without the need for target enrichment methods such as growth cultures or nucleic acid amplification. These devices demonstrate the potential for rapid clinical testing at the point-of-need.

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17

Zhang, Pengchong, Xiaolong Li, Yuhong Zheng, and Li Fu. "Changes in and Recognition of Electrochemical Fingerprints of Acer spp. in Different Seasons." Biosensors 12, no. 12 (December 2, 2022): 1114. http://dx.doi.org/10.3390/bios12121114.

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Electroanalytical chemistry is a metrological analysis technique that provides information feedback by measuring the voltammetric signal that changes when a molecule is involved in an electrochemical reaction. There is variability in the type and content of electrochemically active substances among different plants, and the signal differences presented by such differences in electrochemical reactions can be used for plant identification and physiological monitoring. This work used electroanalytical chemistry to monitor the growth of three Acer spp. This work explores the feasibility of the electrochemical analysis technique for the physiological monitoring of highly differentiated plants within the genus and further validates the technique. Changes in the electrochemical fingerprints of A. cinnamomifolium, A. sinopurpurascens and A. palmatum ‘Matsumurae’ were recorded during the one-year developmental cycle. The results show that the differences in the electrochemical fingerprint profiles of Acer spp. can be used to distinguish different species and identify the growth status in each season. This work also concludes with an identification flowchart based on electrochemical fingerprinting.

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18

Barak-Shinar, D., M. Rosenfeld, J. Rishpon, T. Neufeld, and S. Abboud. "Numerical and experimental analysis of enzymatic reaction in electrochemical sensors: electrochemical enzymatic analysis." IEEE Sensors Journal 6, no. 1 (February 2006): 151–59. http://dx.doi.org/10.1109/jsen.2005.844347.

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19

Li, Qiang, Wei Ying Liu, Guo Yin Sun, and Juan Fang Shang. "Research Progress of Combined Application of Sol-Gel and Electrochemistry." Key Engineering Materials 768 (April 2018): 119–28. http://dx.doi.org/10.4028/www.scientific.net/kem.768.119.

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There were many advantages for functional materials production using Sol-gel method, such as low operating temperature and easy doping. So, it was widely used in materials preparation, such as nano powders, films, functional glass, nanoceramic and modified electrode. The sol-gel modified electrode has extensive application in electrochemical analysis and electrochemical sensors. In addition, the film by electrodeposition can be tightly assembled on electrode substrate and its structure and shape can be easily regulated. So, The two methods are combined to make better use of their respective advantages. Up to now, the film materials using electrochemically induced sol-gel had been used in electrochemistry analysis and functional films preparation. In this paper, it was summarized that the progress of combined application of sol-gel and electrochemistry. Mainly including sol-gel materials, modified electrodes, electrochemical analysis and sensors, and electrochemical induction sol-gel method for the preparation of thin film materials.

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20

SHI, Xin, Junjie MAN, Weiting YE, Jiangwei ZHU, Li FU, Yuhong ZHENG, Yue YIN, Yan NIU, and Xiaojing WANG. "Lycium species and variety recognition technology based on electrochemical sensing of leaf signals." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 51, no. 1 (March 21, 2023): 13054. http://dx.doi.org/10.15835/nbha51113054.

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Identification of plant species and variety has important application value in the process of agricultural production. In this work, we try to use electrochemical fingerprinting technology to collect the electrochemical behavior of electrochemically active substances in plant leaf tissues. Twenty Lycium species and varieties were specifically selected to investigate the recognition ability of electrochemical fingerprinting. Two different extraction solvents and electrolytes were used to create different collection environments. The results show that different Lycium spp. can exhibit different electrochemical fingerprints. Different species of the same species exhibit relatively similar electrochemical fingerprints. After the second derivative processing, the electrochemical fingerprint of plants can be used for classification and recognition by different machine learning models. Partial least squares discriminant analysis (PLS-DA), k-nearest neighbor, (KNN), support vector machine (SVM), random forest (RF) and stochastic gradient boosting (SGB) were used to establish recognition model of Lycium spp. The results show that SGB has the best identification accuracy for electrochemical fingerprint after second derivative treatment.

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21

Wang, You, Hui Xu, Jianming Zhang, and Guang Li. "Electrochemical Sensors for Clinic Analysis." Sensors 8, no. 4 (March 27, 2008): 2043–81. http://dx.doi.org/10.3390/s8042043.

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22

Kuramitz, Hideki. "Electrochemical analysis based on bioaffinity." Analytical Sciences 38, no. 6 (May 27, 2022): 831–32. http://dx.doi.org/10.1007/s44211-022-00112-8.

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23

Grygar, Tomáš, Petr Bezdička, David Hradil, and Ĺubomír Pikna. "Electrochemical Analysis of Metal Oxides." Solid State Phenomena 90-91 (April 2003): 45–50. http://dx.doi.org/10.4028/www.scientific.net/ssp.90-91.45.

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24

Gil, Eric de Souza, and Giselle Rodrigues de Melo. "Electrochemical biosensors in pharmaceutical analysis." Brazilian Journal of Pharmaceutical Sciences 46, no. 3 (September 2010): 375–91. http://dx.doi.org/10.1590/s1984-82502010000300002.

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Given the increasing demand for practical and low-cost analytical techniques, biosensors have attracted attention for use in the quality analysis of drugs, medicines, and other analytes of interest in the pharmaceutical area. Biosensors allow quantification not only of the active component in pharmaceutical formulations, but also the analysis of degradation products and metabolites in biological fluids. Thus, this article presents a brief review of biosensor use in pharmaceutical analysis, focusing on enzymatic electrochemical sensors.

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25

Karaoğlu, Gözde, Gizem Hatipoğlu, and Burak Ulgut. "Electrochemical noise analysis in batteries." Electrochimica Acta 435 (December 2022): 141343. http://dx.doi.org/10.1016/j.electacta.2022.141343.

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26

Ju, Huangxian,. "Electrochemical biosensors for DNA analysis." Frontiers in Bioscience 10, no. 1-3 (2005): 37. http://dx.doi.org/10.2741/1504.

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27

Wang, Jianhua, Ting Li, Lanqun Mao, Yanan Jiang, Ping Yu, and Yang Liu. "Electrochemical analysis of single particles." SCIENTIA SINICA Chimica 46, no. 10 (September 5, 2016): 1064–79. http://dx.doi.org/10.1360/n032016-00094.

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28

Fritts, David H. "An Analysis of Electrochemical Capacitors." Journal of The Electrochemical Society 144, no. 6 (June 1, 1997): 2233–41. http://dx.doi.org/10.1149/1.1837772.

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29

Bowler, Roger, Trevor J. Davies, Michael E. Hyde, and Richard G. Compton. "Electrochemical Cell for Surface Analysis." Analytical Chemistry 77, no. 6 (March 2005): 1916–19. http://dx.doi.org/10.1021/ac048443z.

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30

Kudr, Jiri, Borivoj Klejdus, Vojtech Adam, and Ondrej Zitka. "Magnetic solids in electrochemical analysis." TrAC Trends in Analytical Chemistry 98 (January 2018): 104–13. http://dx.doi.org/10.1016/j.trac.2017.10.023.

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31

Clark, Rose A., Paula Beyer Hietpas, and Andrew G. Ewing. "Electrochemical Analysis in Picoliter Microvials." Analytical Chemistry 69, no. 2 (January 1997): 259–63. http://dx.doi.org/10.1021/ac960559a.

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32

Wouahbi, F., K. Allaf, and V. Sobolik. "Electrochemical analysis of Taylor vortices." Journal of Applied Electrochemistry 37, no. 1 (September 26, 2006): 57–62. http://dx.doi.org/10.1007/s10800-006-9211-2.

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33

Einaga, Yasuaki. "Diamond electrodes for electrochemical analysis." Journal of Applied Electrochemistry 40, no. 10 (March 30, 2010): 1807–16. http://dx.doi.org/10.1007/s10800-010-0112-z.

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34

Wright, A. R. "Principles of electrochemical reactor analysis." Electrochimica Acta 31, no. 3 (March 1986): 409–10. http://dx.doi.org/10.1016/0013-4686(86)80100-1.

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35

Viswanathan, Subramanian, Hanna Radecka, and Jerzy Radecki. "Electrochemical biosensors for food analysis." Monatshefte für Chemie - Chemical Monthly 140, no. 8 (April 15, 2009): 891–99. http://dx.doi.org/10.1007/s00706-009-0143-5.

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36

Ogorevc, Božidar, and Sergej Gomišček. "Electrochemical analysis of cephalosporin antibiotics." Journal of Pharmaceutical and Biomedical Analysis 9, no. 3 (January 1991): 225–36. http://dx.doi.org/10.1016/0731-7085(91)80151-x.

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37

Borek, F. "Electrochemical sensors in immunological analysis." Journal of Immunological Methods 117, no. 2 (February 1989): 295. http://dx.doi.org/10.1016/0022-1759(89)90153-1.

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38

Smyth, W. F., and M. R. Smyth. "Electrochemical analysis of organic pollutants." Pure and Applied Chemistry 59, no. 2 (January 1, 1987): 245–56. http://dx.doi.org/10.1351/pac198759020245.

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39

Kuz'minskii, Y. V., and A. V. Gorodyskii. "Thermal analysis of electrochemical reactions." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 252, no. 1 (October 1988): 21–37. http://dx.doi.org/10.1016/0022-0728(88)85068-x.

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40

Kuz'minskii, Y. V., and A. A. Andriiko. "Thermal analysis of electrochemical reactions." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 252, no. 1 (October 1988): 39–52. http://dx.doi.org/10.1016/0022-0728(88)85069-1.

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41

Kalvoda, R. "Electrochemical analysis for environmental control." Electroanalysis 2, no. 5 (July 1990): 341–46. http://dx.doi.org/10.1002/elan.1140020503.

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42

Rosyiidah, Nur Anisa, and Pirim Setiarso. "Electrochemical analysis of butylated hydroxytoluene." Jurnal Pijar Mipa 18, no. 6 (November 30, 2023): 964–69. http://dx.doi.org/10.29303/jpm.v18i6.5858.

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Electrochemical analysis has carried out butylated hydroxytoluene (BHT) measurements. Cyclic voltammetry is used in this research as a qualitative-quantitative analysis of oxidation and reduction reaction processes, adsorption processes on electrode surfaces, and chemical electron transfer mechanisms. This research aims to determine the optimum deposition time and scan rate in cyclic voltammetry, the BHT standard equation, the limit of detection, and the recovery percentage. In this research, a deposition time of 25 seconds produces the highest current response of 3.89672 x 10-4 Ampere. The scan rate is 150 mV/second, producing the highest and optimum current response of 4.24561 x 10-4 Ampere. BHT standard equation y = (4.92784 x 10-6) x + (1.25207 x 10-4) is obtained with R2 = 0.99933. The limit of detection value is 2.69683 ppm, and the recovery percentage is 101.314%. Therefore, this cyclic voltammetry method is suitable for analyzing BHT because it has high sensitivity.

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43

Rodriguez, Mark A., Mark H. Van Benthem, David Ingersoll, Sven C. Vogel, and Helmut M. Reiche. "In situ analysis of LiFePO4 batteries: Signal extraction by multivariate analysis." Powder Diffraction 25, no. 2 (June 2010): 143–48. http://dx.doi.org/10.1154/1.3393786.

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The electrochemical reaction behavior of a commercial Li-ion battery (LiFePO4-based cathode, graphite-based anode) has been measured via in situ neutron diffraction. A multivariate analysis was successfully applied to the neutron diffraction data set facilitating in the determination of Li bearing phases participating in the electrochemical reaction in both the anode and cathode as a function of state-of-charge (SOC). The analysis resulted in quantified phase fraction values for LiFePO4 and FePO4 cathode compounds as well as the identification of staging behavior of Li6, Li12, Li24, and graphite phases in the anode. An additional Li-graphite phase has also been tentatively identified during electrochemical cycling as LiC48 at conditions of ∼5% to 15% SOC.

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44

Petkovska, Sofija, and Rubin Gulaboski. "Diffusional Electrochemical Catalytic (EC’) Mechanism Featuring Chemical Reversibility of Regenerative Reaction-Theoretical Analysis in Cyclic Voltammetry." Croatica chemica acta 92, no. 4 (2020): 495–502. http://dx.doi.org/10.5562/cca3607.

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We consider theoretically a specific electrochemical-catalytic mechanism associated with reversible regenerative chemical reaction, under conditions of cyclic staircase voltammetry (CSV). We suppose scenario in which two electrochemically inactive substrates “S” and “Y”, together with initial electrochemically active reactant Ox are present in voltammetric cell from the beginning of the experiment. Substrate “S” selectively reacts with initial electroactive reactant Ox and creates electroactive “product” Red (+ Y) in a reversible chemical fashion. The initial chemical equilibrium determines the amounts of Ox and Red available for electrode transformation at the beginning of the electrochemical experiment. Under conditions of applied potential, the electrode reaction Ox(aq) + ne– ⇋ Red(aq) occurs, producing flow of electric current. Under such circumstances, the chemical reaction coupled to the electrochemical step causes a regeneration of initial electroactive species during the time-frame of current-measuring segment in CSV. The features of cyclic voltammograms get significantly affected by the kinetics and thermodynamics of reversible regenerative reaction. We elaborate several aspects of this specific electrode mechanism, and we focus on the role of parameters related to chemical step to the features of calculated voltammograms. While we provide a specific set of results of this particular mechanism, we propose methods to get access to relevant kinetic and thermodynamic parameters relevant to regenerative chemical reaction. The results elaborated in this work can be valuable in evaluating kinetics of many drug-drug interactions, but they can be relevant to study interactions of many enzyme-substrate systems, as well.

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45

Ngo Minh Hung, Pham Thi Le Tram, Nguyen Ngoc Minh, Huynh Thi Lan Phuong, Truong Cong Duc, Luong Thanh Long, Vo Vien, Nguyen Duc Thien, and Vuong Hoan Nguyen. "Electrochemical modification of glassy carbon electrode (GCE) with cobalt ferrite/ reduced graphene oxide composite material comprising polyaniline for dissolved oxygen analysis in water." Vietnam Journal of Catalysis and Adsorption 12, no. 2 (June 30, 2024): 19–24. http://dx.doi.org/10.62239/jca.2024.023.

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The study focuses on the enhancement of glassy carbon electrode (GCE) performance through electrochemical modification with a composite material comprising polyaniline (PANi) conducting polymer and CoFe2O4/reduced graphene oxide (CF/rGO) for the analysis of dissolved oxygen in water. Characterization methods, including Fourier-transform infrared spectroscopy (FT-IR) and Scanning Electron Microscope (SEM), were employed to elucidate the chemical bonding of functional groups within the PANi membrane and modified PANi on the surface of the GCE electrodes as well as examine the surface morphology. Electrochemical studies were conducted to evaluate the electrochemical activity of the modified electrodes, GCE/PANi and GCE/PANi/CF/rGO. Electrochemical studies were conducted to evaluate the electrochemical activity of the modified electrodes, GCE/PANi and GCE/PANi/CF/rGO. Notably, the electrochemically active surface area of the modified electrodes significantly increased, from 0,0756 cm2 (GCE), 0,1106 cm2 (GCE/PANi) to 0,1774 cm2 (GCE/PANi/CF/rGO), in addition the peak current intensity (Ip) on the modified electrodes GCE/PANi and GCE/PANi/CF/rGO also increased compared to the unmodified electrode (GCE), Ip increased from 0,0767.10-3 (A) to 0,18 x 10-3 (A), resulting in an increased ability to sense dissolved oxygen in water.

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46

Lorenzetti, Anabela S., Tania Sierra, Claudia E. Domini, Adriana G. Lista, Agustin G. Crevillen, and Alberto Escarpa. "Electrochemically Reduced Graphene Oxide-Based Screen-Printed Electrodes for Total Tetracycline Determination by Adsorptive Transfer Stripping Differential Pulse Voltammetry." Sensors 20, no. 1 (December 21, 2019): 76. http://dx.doi.org/10.3390/s20010076.

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Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high adsorption capacity and the electrochemical properties of ERGO were simultaneously exploited. The approach was very simple, fast (6 min.), highly selective by combining the adsorptive and the electrochemical features of tetracyclines, and it used just 10 μL of the sample. The electrochemical sensor applicability was demonstrated in the analysis of environmental and food samples. The not-fully explored AdTDPV analytical possibilities on disposable nanostructured transducers become a new tool in food and environmental fields; drawing new horizons for “in-situ” analysis.

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47

Maouche, Naima, and Belkacem Nessark. "Cyclic Voltammetry and Impedance Spectroscopy Behavior Studies of Polyterthiophene Modified Electrode." International Journal of Electrochemistry 2011 (2011): 1–5. http://dx.doi.org/10.4061/2011/670513.

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We present in this work a study of the electrochemical behaviour of terthiophene and its corresponding polymer, which is obtained electrochemically as a film by cyclic voltammetry (CV) on platinum electrode. The analysis focuses essentially on the effect of two solvents acetonitrile and dichloromethane on the electrochemical behaviour of the obtained polymer. The electrochemical behavior of this material was investigated by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The voltammograms show that the film of polyterthiophene can oxide and reduce in two solutions; in acetonitrile, the oxidation current intensity is more important than in dichloromethane. The impedance plots show the semicircle which is characteristic of charge-transfer resistance at the electrode/polymer interface at high frequency and the diffusion process at low frequency.

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48

LEGAT, ANDRAŽ, and EDVARD GOVEKAR. "DETECTION OF CORROSION BY ANALYSIS OF ELECTROCHEMICAL NOISE." Fractals 02, no. 02 (June 1994): 241–44. http://dx.doi.org/10.1142/s0218348x94000259.

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Stochastic fluctuations of the corrosion potential and the current generated by corrosion reactions are known as electrochemical noise. These fluctuations can be measured in freely corroding systems, therefore the characteristics of electrochemical noise are influenced only by the type and rate of corrosion. The classical spectral analysis of electrochemical noise in the frequency domain achieve good correlation to corrosion rate and type; however, the chaotic nature of corrosion processes requires different mathematical treatment. In this paper self-similarity and fractal dimensions of electrochemical noise are examined in order to explain its mechanism and improve the corrosion monitoring system. Capacity and correlation fractal dimensions of voltage and current-noise, measured on various metals, are calculated and compared to the results of the classical spectral analysis. Relations between different rates and types of corrosion (passivation, local, uniform) and the fractal characteristics of electrochemical noise are established. The analysis of spontaneous electrochemical voltage and current fluctuations is confirmed as a rich source of information in corrosion processes.

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49

Zainul, Rahadian, Illyas Md Isa, Siti Nur Akmar Mohd Yazid, Norhayati Hashim, Sharifah Norain Mohd Sharif, Mohamad Idris Saidin, Mohamad Syahrizal Ahmad, M. Si Suyanta, and Yulkifli Amir. "Enhanced Electrochemical Sensor for Electrocatalytic Glucose Analysis in Orange Juices and Milk by the Integration of the Electron-Withdrawing Substituents on Graphene/Glassy Carbon Electrode." Journal of Analytical Methods in Chemistry 2022 (April 12, 2022): 1–15. http://dx.doi.org/10.1155/2022/5029036.

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In this work, a novel electrochemical sensor was developed by electron-withdrawing substituent modification of 1-phenyl-3-methyl-4-(4-fluorobenzoyl)-5-pyrazolone on a graphene-modified glassy carbon electrode (HPMpFP-graphene/GCE) for glucose detection. The results of characterizations using a scanning electron microscope, Fourier transform infrared spectroscopy, Raman spectroscopy, and nuclear magnetic resonance spectroscopy showed the successful fabrication of HPMpFP-graphene nanocomposite, which served as an electroactive probe for glucose detection. The electron transfer ability of HPMpFBP-graphene/GCE has been successfully revealed using cyclic voltammetry and electrochemical impedance spectroscopy results. The good electrochemical performance was shown by well-defined peak currents of square wave voltammetry under various parameters, including pH, HPMpFP and graphene composition, and scan rate effect. A high electrochemically evaluated surface area using chronoamperometry suggested that the present glucose detection response was intensified. The chronoamperometry results at a work potential of 0.4 V presented a wide linear range of 1 × 103–90 µM and 88–1 µM with 0.74 µM (S/N = 3) as the detection limit. An acceptable recovery has been revealed in the real sample analysis. The electrochemical sensing behaviour of the composite indicates that it may be a promising candidate for a glucose sensor and it significantly extends the range of applications in the electrochemical field.

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50

Metikos-Hukovic, Mirjana, Zoran Grubac, and Sasha Omanovic. "Change of n-type to p-type conductivity of the semiconductor passive film on N-steel: Enhancement of the pitting corrosion resistance." Journal of the Serbian Chemical Society 78, no. 12 (2013): 2053–67. http://dx.doi.org/10.2298/jsc131121144m.

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The electrochemically-assisted modification of the N-austenitic stainless steel (ASS N25) surface was successfully employed to improve barrier properties of the passive film in a chloride containing solution. The chemical composition, electronic and barrier properties of the surface film before and after the electrochemical treatment were examined using X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Electrochemical measurements were carried out in a corrosion testing solution. The excellent corrosion resistance (both pitting and general) of the N-steel?s modified surface was discussed according to the Mott-Schottky analysis of the interfacial capacitance of the space charge layer and EIS results. The conductivity change of the surface film from an n- to a p-type in the pitting susceptible region was explained using the XPS analysis and semiconducting properties of the film.

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